NO
YES
YES
YES
YES
NO
NO
NO
NO
YES
Is there any foreign material
obstructing the fan propeller?
Does the fan rotate freely when it is
turned by hand?
Is there DC280V between (CNFAN
(red) - (blue) on the fan motor’s
connection?
Cut and reset the voltage supply.
Has the fault been corrected?
Temporary surge on incoming
supply may have caused the alarm.
Replace the fan motor. (If the fault
persists, replace the control PCB.)
Is fuse F2 intact?
Check the power supply.
Replace defective fan motor and
control PCB.
Replace the fan motor. If the
resistance between
(Vm):red-(GND):blue is 1 kΩ or
lower, the motor is defective.
Remove foreign material.
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